package com.djz.stuinfomge.dao.impl;

import java.util.List;

import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Repository;

import com.djz.stuinfomge.dao.IClassDAO;
import com.djz.stuinfomge.entity.Class;
import com.djz.stuinfomge.entity.PageBean;
import com.djz.stuinfomge.exception.PageNumOutOfRange;
import com.djz.stuinfomge.util.Finder;

/**
 * A data access object (DAO) providing persistence and search support for Class
 * entities. Transaction control of the save(), update() and delete() operations
 * can directly support Spring container-managed transactions or they can be
 * augmented to handle user-managed Spring transactions. Each of these methods
 * provides additional information for how to configure it for the desired type
 * of transaction control.
 * 
 * @see com.djz.stuinfomge.entity.Class
 * @author MyEclipse Persistence Tools
 */
@Repository
public class ClassDAO extends BaseDaoImpl<Class>  implements IClassDAO{
	
	public PageBean<Class> getPage(Integer pageNo, Integer size, Class bean) throws PageNumOutOfRange {
		// 根据条件构造JPA-QL
		Finder finder = Finder.create("from Class");


		finder.append("where 1=1");

		if (bean != null && bean.getName() != null) {

			finder.append("and name like :name").setParam("name",
					"%" + bean.getName() + "%");
		}
		finder.append("order by id desc");
		log.debug("finder: "+ finder +" pageNo: "+ pageNo + " size: "+ size);
		PageBean<Class> page = find(finder, pageNo, size);
		return page;
	
	}
	private static final Logger log = LoggerFactory.getLogger(ClassDAO.class);
	// property constants
	public static final String NAME = "name";
	public static final String TOTAL_LEARN_YEAR = "totalLearnYear";
	public static final String SPECIALITY_ID = "specialityId";

	public void save(Class transientInstance) {
		log.debug("saving Class instance");
		try {
			getSession().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(Class persistentInstance) {
		log.debug("deleting Class instance");
		try {
			getSession().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public Class findById(java.lang.Integer id) {
		log.debug("getting Class instance with id: " + id);
		try {
			Class instance = (Class) getSession().get(
					"com.djz.stuinfomge.entity.Class", id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(Class instance) {
		log.debug("finding Class instance by example");
		try {
			List results = getSession().createCriteria(
					"com.djz.stuinfomge.entity.Class").add(
					Example.create(instance)).list();
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List findByProperty(String propertyName, Object value) {
		log.debug("finding Class instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from Class as model where model."
					+ propertyName + "= ?";
			Query queryObject = getSession().createQuery(queryString);
			queryObject.setParameter(0, value);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByName(Object name) {
		return findByProperty(NAME, name);
	}

	public List findByTotalLearnYear(Object totalLearnYear) {
		return findByProperty(TOTAL_LEARN_YEAR, totalLearnYear);
	}

	public List findBySpecialityId(Object specialityId) {
		return findByProperty(SPECIALITY_ID, specialityId);
	}

	public List findAll() {
		log.debug("finding all Class instances");
		try {
			String queryString = "from Class";
			Query queryObject = getSession().createQuery(queryString);
			return queryObject.list();
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}

	public Class merge(Class detachedInstance) {
		log.debug("merging Class instance");
		try {
			Class result = (Class) getSession().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(Class instance) {
		log.debug("attaching dirty Class instance");
		try {
			getSession().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(Class instance) {
		log.debug("attaching clean Class instance");
		try {
			getSession().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	
}
